Spark-plug.



.1. BERRY.

SPARK PLUG.

APPLICATION min Aus.30.1916.

i' www@ 5am. l

'e ie secured in position in @he body' by miie 8 and is ieimeci with a lengiuciinefl eoie Teeeiviug the cenier electrode 9, on 011e emi @if which is threaded a nui; l0.

A cii'cuier sparking member li is seemed ie *die end of the electrode 9 opposite the lmeh "i0 and ie foimed with an oppositeiy 'bewf'eied erige i2, disposed in spaced ieifaffion ii@ 'ille enguiai ieiminais o' *die epn'iiiig mem ees 1.3, which are electiieaiiy emiieebed with ifhe body 5 to provide e spark gap.. The iiiwmdiy directed terminais of "che dief meiceiiy Opposed sparking membeie i3 are eppoei'eiy neveied similariy te the edge the sparking member 12, so as to increase the spmiing euface tiieieo and fender me spari?. plug mme eiicent in uae.

What claim is: v

e. sped; piugcomprising e, iwiiew bmi?, en insuiem" fis'poeed within Seid body, mail having one emi terminating within the l-06g, i. emi o' Vthe insuefaor being recessed, me eiec'mde extending through the insuieto and beyond die lower end of the body, a eii euhm." sparking member secured he iowe' end ei ene eiecede md having; oppesiiei` beve'ied edges, pins carried by lower' ends of the body, an annuler sparking memise'f formed upon 'the pins and having e @entrai opening eceiving the eircuar ssi-peeking; member m having" ehe Weil of said openi .g opposi'eiy beveled for eopeming with 1* beveled feces o* he 4eiri'euim' sparking in b f to inciease the sparking; surface.

esiimeny 'wiierenf' Ei ahlif; my eigneiie :in reeence of two Witnesses'.

HARRY Si".

Witnef'eee:

Mouwen, HEDLUND, 

